LEWES, DELAWARE

NCDC 1971-2000 Monthly Normals

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Mean Max. Temperature (F) 44.6 46.9 54.7 64.9 73.9 81.9 86.3 84.5 78.9 68.5 58.9 49.5 66.1
Highest Mean Max. Temperature (F) 53.4 57.2 62.4 71.3 81.3 86.5 90.5 87.7 83.2 73.1 64.8 57.3 90.5
Year Highest Occurred 1990 1976 1997 1994 1991 1986 1999 1988 1998 1990 1985 1984 1999
Lowest Mean Max. Temperature (F) 33.4 34.3 48.3 58.5 68.4 75.8 81.8 81.7 76.1 62.2 52.3 36.7 33.4
Year Lowest Occurred 1977 1978 1984 1975 1978 1984 1978 1992 1975 1976 1976 1989 1977
Mean Temperature (F) 36.4 38.3 45.6 54.6 64.0 72.5 77.3 75.9 70.2 59.2 50.0 41.1 57.1
Highest Mean Temperature (F) 44.7 47.5 52.4 60.2 70.8 76.5 81.2 79.1 74.3 63.7 57.3 49.1 81.2
Year Highest Occurred 1990 1997 1997 1994 1991 1994 1999 1988 1998 1990 1985 1982 1999
Lowest Mean Temperature (F) 24.1 26.0 40.1 48.7 59.7 68.1 73.3 72.5 67.2 53.8 41.7 29.2 24.1
Year Lowest Occurred 1977 1978 1984 1975 1978 1972 1978 1981 1976 1976 1976 1989 1977
Mean Min. Temperature (F) 28.2 29.6 36.4 44.3 54.1 63.0 68.3 67.2 61.5 49.8 41.1 32.7 48.0
Highest Mean Min. Temperature (F) 37.3 38.6 42.4 49.0 60.2 67.9 71.8 70.4 65.4 56.9 49.8 41.0 71.8
Year Highest Occurred 1998 1997 1997 1994 1991 1989 1999 1999 1998 1971 1985 1982 1999
Lowest Mean Min. Temperature (F) 14.7 17.6 31.7 38.9 50.3 58.3 64.7 61.4 56.3 43.9 31.0 21.6 14.7
Year Lowest Occurred 1977 1978 1978 1975 1994 1979 1978 1981 1981 1981 1976 1989 1977
Mean Precipitation (in.) 4.01 3.22 4.45 3.54 3.91 3.15 4.19 5.34 3.77 3.42 3.33 3.67 46.00
Highest Precipitation (in.) 8.79 6.84 7.86 8.71 8.36 7.64 11.26 12.54 8.12 6.85 7.31 8.60 12.54
Year Highest Occurred 1987 1979 1984 1983 1984 1982 1989 1985 1999 1971 1997 1996 1985
Lowest Precipitation (in.) 0.32 1.01 1.02 0.54 1.03 0.29 0.65 0.59 0.53 0.04 0.87 0.39 0.04
Year Lowest Occurred 1981 1991 1986 1985 1986 1971 1974 1995 1978 2000 1974 1988 2000
Heating Degree Days (F) 887. 748. 603. 319. 103. 14. 0. 0. 15. 216. 452. 741. 4098.
Cooling Degree Days (F) 0. 0. 0. 7. 71. 238. 382. 336. 170. 35. 1. 0. 1240.

Southeast Regional Climate Center, sercc@climate.ncsu.edu